Fence Type

Single-layered fence Naco, Arizona Mostly 14' airport matting. There are variations in this construction resulting in a higher or lower fence. Not very effective		Two-layered fencing San Diego
Railroad rail vehicle barriers Easily defeated by cutting at the weld for removal at will or by using a ramp.		Round bollard vehicle barriers Goldwater Bombing Range Supposed to be filled with cement but many sections such as the one here near Yuma were not. Smugglers can cut them in a way that allows the fence sections to be removed for drive-throughs.
Square bollard vehicle barrier Organ Pipe National Monument These were filled with cement. Ramps can be used to drive over the barrier.		Barbed Wire Stock fence Ladd Ranch in Arizona Many breaks were seen in the stock fence all along the border
	No fence or totally destroyed East of Calexico,California At least 100 miles of the border have no fence at all. Much of this open area is on and near the Goldwater Air Force Range in Arizona. The rest is spotted along the border.